Institute of Environmental Engineering and Research, University of Engineering and Technology, Lahore, Pakistan.
Department of Chemical and Polymer Engineering, University of Engineering and Technology, Lahore, Pakistan.
Int J Phytoremediation. 2021;23(8):809-817. doi: 10.1080/15226514.2020.1858753. Epub 2020 Dec 12.
Leachate control and management is a major challenge faced during solid waste management as it may pollute surface and groundwaters. In the current research, constructed wetlands (CWs) vegetated with plant in combination with catalytic ozonation by ferrous (Fe)-coated zeolite A was studied for the treatment of leachate. The CWs treatment with 9 days detention reduced the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) up to 75.81% and 69.84%, respectively. Moreover, total suspended solids (TSS), total dissolved solids (TDS), and total kjeldahl nitrogen (TKN) removal of 91.16%, 33.33%, and 25.22% were achieved, respectively. The Fe-coated zeolite A catalytic ozonation further reduced the COD up to 90.7%. Comparison of the processes showed the effective performance of the combined process (CW/O/Fe-zeolite) with 97.76% COD reduction of leachate. It is, therefore, concluded that the studied combined process (CW/O/Fe-zeolite A) was more efficient as compared with single ozonation and CW alone, hence it can be implied for the leachate treatment in real conditions.
渗滤液的控制和管理是固体废物管理中面临的主要挑战，因为它可能会污染地表水和地下水。在当前的研究中，采用 植物构建的湿地（CW）与铁（Fe）涂层沸石 A 的催化臭氧化相结合，用于处理渗滤液。CW 处理 9 天停留时间可将化学需氧量（COD）和生化需氧量（BOD）分别降低 75.81%和 69.84%。此外，总悬浮固体（TSS）、总溶解固体（TDS）和总凯氏氮（TKN）的去除率分别达到 91.16%、33.33%和 25.22%。Fe 涂层沸石 A 的催化臭氧化进一步将 COD 降低了 90.7%。对这些过程的比较表明，组合工艺（CW/O/Fe-zeolite）的有效性能较好，渗滤液的 COD 去除率达到 97.76%。因此，与单独的臭氧化和 CW 相比，研究中的组合工艺（CW/O/Fe-zeolite A）更有效，因此可以在实际条件下用于渗滤液处理。
